OA41021: EZZ4321I ERROR: CODE=0810004A DURING SETUP PHASE ON CONNECTION FOR DEVICE IUTSAMEH

Obtain the fix for this APAR.

APAR status

• Closed as unreproducible in next release.

Error description

• When the EE XCA Major Node is activated some time after VTAM
  start, the following message is seen in TCP/IP:
    EZZ4321I ERROR: CODE=0810004A DURING SETUP PHASE ON CONNECTION
    TO x.x.x.x FOR DEVICE IUTSAMEH.
  All EE XCA lines remain in PALNK status. Once hit, this
  condition is persistent. Enterprise Extender cannot be
  activated.
  

Local fix

• Restart VTAM with EE XCA Major Node in ATCCONxx config list
  with at least one line ISTATUS=ACTIVE. This will allow the
  IUTSAMEH connection between VTAM and TCP/IP to be activated as
  required for Enterprise Extender functionality.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All using Enterprise Extender (EE).          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Attempt to activate the EE XCA Major    *
  *                      Node yields the following TCP/IP        *
  *                      message:                                *
  *                                                              *
  *                          EZZ4321I ERROR: CODE=0810004A       *
  *                          DURING SETUP PHASE ON CONNECTION    *
  *                          TO  x.x.x.x FOR DEVICE IUTSAMEH.    *
  *                                                              *
  *                      All EE XCA lines remain in PALNK        *
  *                      status.                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  With VTAM active, HPR is running and allocating TIPACs for
  packing buffers.  These TIPACs may be in the T100 or T200
  format.  As they are discarded via TSDSCARD/TSALERT, ISTTSCUD
  checks each buffer to determine if it might be an EE activation
  request.  ISTTSCUD looks in the PDUWA to do so.
  
  Because these TIPACs are not in the expected TI00 format, the
  field XBFL_PDUWA is actually pointing to an ISTSND block.
  ISTTSCUD references the ISTSND as though it were a PDUWA and
  falsely decrements the TSEXT EE count as a result, making the
  count go negative.
  
  Some time later, request to activate the EE XCA Major Node is
  issued.  Because the TSEXT EE count is not zero, the request
  fails. VTAM must be recycled to get EE to activate again.
  

Problem conclusion

Temporary fix

Comments

• A currently unused bit in the base TSCB (TSCFIS) has been reused
  to indicate that the PDUWA has information that must be cleaned
  up during discard.  The new name is TSC_PDUWA_Cleanup.
  
  The new bit will be turned on and off as the PDUWA_EE_Setup or
  PDUWA_WUDInc indicator is turned on and off.  This will tell
  TSCB discard modules (ISTTSCUD, ISTTSCUC) whether or not it is
  safe to reference the PDUWA.
  
  All parts that set either PDUWA_EE_Setup or PDUWA_WUDInc have
  been changed to also set TSC_PDUWA_Cleanup accordingly.
  
    ISTTSCUC
    ISTTSCUD
    IUTLLCCS
    IUTLLCIO
    IUTLLCIX
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UA67638 UA67639

Modules/Macros

•    ISTTSCB  ISTTSCUC ISTTSCUD IUTLLCCS IUTLLCIO
  IUTLLCIX
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R1C0 PSY UA67638

     UP13/02/09 P F302

• R1D0 PSY UA67639

     UP13/02/09 P F302

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.